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Inside Oil Pan, Paint or No Paint

Discussion in 'The Hokey Ass Message Board' started by G V Gordon, Sep 22, 2008.

  1. G V Gordon
    Joined: Oct 29, 2002
    Posts: 5,716

    G V Gordon
    from Enid OK

    Getting ready to put a rear main seal and better pan on the T. The pan has been bead blasted and is clean.

    I know I have seen the insides of pans "painted" and wondered if that would be a good idea since hot rods see periods of seasonal low use time. Even engines that get used everyday can have rust form from condensation.

    If yes, what is normally used to coat the inside of a pan or is it better to just leave it bare. You sure wouldn't want loose paint floating around the pan and clogging stuff up.
  2. I don't think I've ever seen one painted inside. A baked enamel finish might hold up but I don't know of any paint that would last. Why bother? You certainly aren't going to paint the bearings or cylinder walls and they will sit as long as the pan when the car isn't in use.
  3. billbrown
    Joined: Dec 24, 2007
    Posts: 595


    you wight as well leave it alone. start it up once a week and dont try to reinvent the wheel.
  4. temper_mental
    Joined: Oct 22, 2006
    Posts: 2,718

    from Texas

    No paint Block crank rods are not painted . .My 2 cents

  5. GV,The only painting I have ever seen done inside an engine was in the crank/rods, timing chain and intake lifter valley area. We used the same paint/varnish that is used on electric motors. I believe it is called Glyptol and is very tough. I still have a SBC 3x2 intake that has glyptol on the underside that looks good and it was done close to 20 years ago.I don't see why it couldn't be used inside the oil pan also. It sure makes a difference in how well oil drains back to the pan and how little the oil darkens from leaching old oil/grime from the cast iron in the block.LarryTOKC
  6. Django
    Joined: Nov 15, 2002
    Posts: 10,197

    from Chicago

    Doesn't sound like a good idea to me.
  7. Von Rigg Fink
    Joined: Jun 11, 2007
    Posts: 13,426

    Von Rigg Fink
    from Garage

    if you paint it..or coat it..In my opinion..your lookin' for trouble.
  8. If your going to paint anything inside of an engine you better make damn sure it stays on. I can tell you horror stories of the paint coming off and clogging up the oil pump screen. The factory stuff is baked on like powder coating >>>>.
  9. jonny o
    Joined: Oct 26, 2007
    Posts: 836

    jonny o

    Maybe find a way to keep it dry in the winter? Or fill the darn motor to the brim for the store.... but I wouldn't risk it myself. If you are set on it, powdercoat it. Or Jet-hot or something guaranteed.
  10. gotwood
    Joined: Apr 6, 2007
    Posts: 264

    from NYC

    The block is painted to seal the pours in the surface of block to aid in oil flow. There would be no reason to paint the inside of a sheet metal pan unless maybe you were applying some sort of seal coat on a welded pan. The risk of adhesion just isn't worth it. If you must, powdercoat the entire piece but again what would it ad??
  11. zman
    Joined: Apr 2, 2001
    Posts: 16,663

    from Garner, NC

    no paint sir
  12. The inside of an engine will rust like crazy after you glass bead. But it's like an old cast-iron skillet, as in after you season it the hot oil closes up the pores in the metal. Long and the short is we hate to glass bead if can help it. If you just use the engine and get out for some good cruzin time it should be seasoned and not cause issues >>>>.
  13. Shifty Shifterton
    Joined: Oct 1, 2006
    Posts: 4,964

    Shifty Shifterton

    Glyptol works because of mechanical grip onto rough cast surfaces like blocks or the underside of an intake manifold. Risk to reward ratio just isn't right for sheetmetal components.
  14. PORE 15, has a product to seal & coat gas tanks. Oil pans? I don't think I would it. Bob
  15. G V Gordon
    Joined: Oct 29, 2002
    Posts: 5,716

    G V Gordon
    from Enid OK

    The Nay's have it. The ones I have seen (don't remember where) were a dark red orange color. I will go bare.

    Thanks for the input.
  16. cadillac dave
    Joined: Mar 17, 2006
    Posts: 669

    cadillac dave

    if you want the best ...jet hot coat it inside. the oil won't stick to it and will lube the engine instead. cadillac dave
  17. Elvisaurusrex
    Joined: Dec 28, 2007
    Posts: 403


    Maybe just a "Kilroy Was Here", to mess with the next guy..
  18. Stovebolt 6
    Joined: Jul 24, 2007
    Posts: 121

    Stovebolt 6

    If you paint it you are looking for trouble soon.

    Get some magnets and put them in there is a better idea.
    When you remove the pan and they look like little hedgehogs
    you know why.

    They catched everything that is not flowing arround in your motor now.

    my ct2

  19. Hot Rod To Hell
    Joined: Aug 19, 2003
    Posts: 3,036

    Hot Rod To Hell
    from Flint MI

    The dark red orange stuff you've seen is the Glyptol that was mentioned above.
  20. Bluto
    Joined: Feb 15, 2005
    Posts: 5,113

    Member Emeritus

    I paint the inside of the block, pan, everything

    No spray paint just brushed Rusto rusty metal primer But after 1000's of engines and 45 years of building race cars what the f'doIknow........

    Castings never stop sheading crap.

    Windage is helped.

    By the way sealing the inside parts insures that more junk comes out with each oil change. And change the oil when it's warm.

    AND REMEMBER BRUSH ON! The sprap paint is a different formula!!!

    Sorry Guys your wrong I have NEVER had this stuff come off. :)

    I build Gasoline motors I might bet that fuel motors are a whole nuther story.

    I tried Glyptol .... didn't work any better and just cost more money.
  21. fab32
    Joined: May 14, 2002
    Posts: 13,985

    Member Emeritus

  22. Should talk to the jackass that built the car so low the pan scraped like that!
  23. G V Gordon
    Joined: Oct 29, 2002
    Posts: 5,716

    G V Gordon
    from Enid OK

    OK, give me a call. LOL
  24. skwurl
    Joined: Aug 25, 2008
    Posts: 1,620


    Metel flake it with some Ol school striping. Those goldchainers aint thought of that!

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